Differences in VISA-A score between Q1 and Q5 at each time point (adjusted for sex, BMI, age, symptom duration and AAS)
| Group | Difference | 95% CI for difference | ||||
| Q1 | Q5 | Mean difference (±SE) | P value | Lower bound | Upper bound | |
| Baseline (n=45/39) | 43.9 (20.9) | 41.8 (17.9) | 2.1±3.9 | 0.59 | −5.6 | 9.8 |
| 6 weeks* (n=35/29) | 49.2 (18.8) | 43.7 (18.7) | 5.5±4.6 | 0.24 | −3.7 | 14.8 |
| 12 weeks* (n=32/28) | 50.7 (19.5) | 54.5 (20.1) | −3.8±5.1 | 0.45 | −14.0 | 6.3 |
| 24 weeks* (n=29/26) | 66.4 (18.9) | 55.2 (18.9) | 11.2±5.0† | 0.03 | 1.0 | 21.3 |
Values are displayed as mean (SD). P values were Bonferroni corrected.
*Also adjusted for baseline VISA-A score.
†This difference exceeds the minimal clinically important difference of 7 points at 24 weeks.40
AAS, Ankle Activity Score; BMI, body mass index; VISA-A, Victorian Institute of Sports Assessment-Achilles.